Duotone Unit Strut Bladder

The Duotone Unit Foil Wing Strut Bladder Spare is an authentic factory replacement part designed to restore the structural rigidity and high-pressure performance of your wing's central strut. The central strut dictates the wing’s canopy tension, handling, and overall stability; if your wing collapses, twists, or loses air due to a puncture or compromised valve, replacing the strut bladder brings it back to original factory-spec pressure retention.

These original parts cover all design generations spanning from 2023 through 2026, accommodating standard, SLS, and D-Lab constructions.

Key Performance Features

• Generation-Specific Fitment: Duotone introduces annual profile modifications to the Unit's ergonomic strut geometry. These replacement bladders are precision-patterned to mirror the exact length, volume, and taper of your specific model year (2023–2026) and canopy size.

• High-Grade TPU Material: Fabricated from premium, ultra-lightweight Thermoplastic Polyurethane (TPU). This material maximizes structural elasticity and cold-water flexibility while minimizing overall swing-weight to keep the wing drifting naturally when flagged out.

• Pre-Welded Max Flow Valves: Every spare bladder comes equipped with authentic, factory-welded Duotone Max Flow inflation valves. The high-frequency thermo-welds are heavily reinforced to comfortably withstand the maximum PSI loads required for a completely stiff strut framework.

• Construction Variant Compatibility: Available in custom volumes tailored to the standard Dacron frames, the high-stiffness Penta TX layout of the SLS series, and the specialized dimensions of the Concept Blue and D-Lab constructions.

Technical Selection Matrix

Because internal bladder dimensions and valve positionings shift between model years, matching your specific wing configuration is critical for a smooth, wrinkle-free installation.

Model Year	Wing Variant Options	Available Sizes	Profile Characteristics
2023	Unit V3 / SLS / D-Lab	2.0m – 6.5m	Tailored to the original ergonomic rigid strut angle.
2024	Unit / SLS / D-Lab	2.0m – 6.5m	Accommodates variations in updated mid-canopy tensioning.
2025 – 2026	Unit / SLS / Concept Blue	2.0m – 6.5m+	Designed for contemporary segmented and streamlined struts.

Installation Tips & Best Practices

1. Verify Your Gear: Always check the small technical data tag printed on your wing’s canopy or near the inflation valves to confirm the precise model year, construction variant (Standard, SLS, Concept Blue, or D-Lab), and square meter size before installing the replacement.

2. Utilize a Guide Line: When extracting the old damaged bladder, tie a clean retriever line to the internal tail loop. This leaves a direct guide track running through the strut sleeve, making it simple to pull the new spare back into position without twisting or bunching it up.

3. Minimize Friction: Lightly dust the replacement TPU bladder with talcum powder prior to feeding it into the strut. This serves as a dry lubricant, allowing the bladder to unpack and expand flawlessly against the inner walls during your first high-pressure inflation, preventing accidental pinches or localized stretching.